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Finding the Fourth Proportional to 248,643.63, 343,156.65 and 138,273.29

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Solution

The fourth proportional to 248,643.63, 343,156.65 and 138,273.29 is: 190,832.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,643.63 : 343,156.65 = 138,273.29 : x
  2. Step 2: Convert to fraction form
    248,643.63/343,156.65 = 138,273.29/x
  3. Step 3: Cross multiply
    248,643.63x = 343,156.65 × 138,273.29
  4. Step 4: Simplify right side
    248,643.63x = 47,449,398,033.41
  5. Step 5: Solve for x
    x = 47,449,398,033.41/248,643.63
  6. Step 6: Final answer
    x = 190,832.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.